18650型锂离子电池火灾爆炸预警装置研究

The research and of explosion early warning device for type 18650 lithium ion battery fire

基于锂离子电池的热失控过程设计实验,分析充放电电流为0.5C、1C、2C、3C时锂离子电池热失控过程的温度变化特征。在此基础上自主研发针对18650型锂离子电池及电池组的热失控三级预警装置。为验证装置的有效性,开展锂离子电池外部短路、低阻值放电实验,结果表明,该装置在应对异常升温的锂离子电池时显示出优良的预警性能,能满足对18650型锂离子电池火灾爆炸预警工作的要求。

Experiments were designed based on thermal runaway process of the lithium ion battery,the characteristics of the temperature change in the process when the charge and discharge current was 0.5C,1C,2C and 3C separately were analyzed.A three-level warning device for thermal runaway of 18650 lithium ion battery was developed.In order to verify the effectiveness of the device,external short-circuit and low resistance discharge experiments of the lithium ion battery was made.The results showed that the device shows excellent early warning performance in dealing with abnormal heating of lithium ion batteries,and can meet the requirements for the early warning of fire and explosion of type 18650 lithium ion batteries.